KOSPI: a 3.0σ fall on 13 October 2026
Recorded 15 October 2026On 13 October 2026 KOSPI fell 5.46% close to close, 3.0 times its typical daily move of 1.82% over the 20 sessions before it: its largest move since 31 July 2026. 7 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- −5.46%
- Size
- −3.0σ
- Typical day before it
- 1.82%
- Close
- 6,035.35
- Previous close, 12 October 2026
- 6,384.24
- Since, to 21 October 2026
- −4.97%
KOSPI, the 30 sessions to 13 October 2026
Daily closes; the last point is the quake
Show values
| Point | KOSPI |
|---|---|
| 26 Aug 2026 | 6,808 |
| 27 Aug 2026 | 6,912 |
| 28 Aug 2026 | 6,789 |
| 31 Aug 2026 | 6,820 |
| 1 Sep 2026 | 6,836 |
| 2 Sep 2026 | 6,563 |
| 3 Sep 2026 | 6,579 |
| 4 Sep 2026 | 6,687 |
| 7 Sep 2026 | 6,995 |
| 8 Sep 2026 | 6,955 |
| 9 Sep 2026 | 7,052 |
| 10 Sep 2026 | 7,034 |
| 11 Sep 2026 | 6,910 |
| 14 Sep 2026 | 6,684 |
| 15 Sep 2026 | 6,627 |
| 16 Sep 2026 | 6,718 |
| 17 Sep 2026 | 6,715 |
| 18 Sep 2026 | 6,894 |
| 21 Sep 2026 | 7,008 |
| 22 Sep 2026 | 7,018 |
| 23 Sep 2026 | 7,081 |
| 28 Sep 2026 | 6,890 |
| 29 Sep 2026 | 6,871 |
| 30 Sep 2026 | 6,838 |
| 1 Oct 2026 | 6,971 |
| 2 Oct 2026 | 7,004 |
| 6 Oct 2026 | 6,941 |
| 7 Oct 2026 | 6,804 |
| 8 Oct 2026 | 6,626 |
| 12 Oct 2026 | 6,384 |
| 13 Oct 2026 | 6,035 |
The same day
Other quakes on 13 October 2026
| Instrument | Move | Size |
|---|---|---|
| Johnson & Johnson JNJ | −5.73% | −5.5σ |
| Optimism OP | +21.44% | +3.3σ |
| US Dollar / Taiwan Dollar USD/TWD | +0.56% | +3.2σ |
| AbbVie ABBV | −2.40% | −3.1σ |
KOSPI's other quakes
On record, newest first
- 15 October 2026: −7.57%, −3.6σ
- 31 July 2026: +17.91%, +3.5σ
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of KOSPI's previous 20 daily returns. A quake is 3σ or more. This record was made the night after the day finished trading and has not been changed since. The live chart is on KOSPI's page; the last few months of every market's daily moves are on the volatility terrain, and every quake on record is in the quake archive.